GEAR-SUN 5505757 - Caterpillar

5505757 GEAR-SUN Caterpillar parts

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Alternative (cross code) number:
CA5505757
550-5757
5505757

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#1579202 5505757

2025-09-02

#1565462 5505757

2025-07-28

Number on catalog scheme: 6

Caterpillar 5505757 Parts scheme GEAR-SUN

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Operation Description:In order to find the cause of an emergency stop shutdown, perform the following procedure.Test Step 1. CHECK THE EMERGENCY STOP PUSH BUTTON (ESPB).
Pull out the ESPB in order to deactivate the push button. Some versions of ESPB must be turned clockwise before you pull out the ESPB.
Turn the engine control switch (ECS) to the OFF/RESET position and then turn the ECS to the STOP position.Expected Result:The ESPB should pop out. The emergency stop indicator should be OFF.Results:
OK - The system is operating correctly. The problem may be intermittent. Repair: Check the harness and all electrical connections of the ESPB circuit. See Testing and Adjusting, "Electrical Connector - Inspect". Stop.
ESPB NOT POPPED OUT - The ESPB does not pop out.Repair: Replace the ESPB. Stop.
ESPB OUT, INDICATOR FLASHING - The ESPB pops out and the emergency stop indicator is FLASHING. Go to 2.Test Step 2. CHECK THE EMERGENCY STOP INDICATOR.Note: The following procedure will create diagnostic codes. Clear these created diagnostic codes after troubleshooting is complete.
The ECS remains in the STOP position.
Disconnect the harness connector from the GSC.
Temporarily install a jumper from contact "39" of the GSC to "B-". This simulates the OFF/RESET position of the ECS.
Check the operation of the emergency stop indicator.Expected Result:The emergency stop indicator should be OFF.Results:
OK - The problem is with the ESPB or the related wiring.Repair: Troubleshoot the circuit. See the Generator Set Wiring Diagram. Refer to Testing And Adjusting, "Schematics and Wiring Diagrams". Repair failed components or replace failed components, if necessary. Repair the wiring or replace the wiring, if necessary. Stop.
NOT OK - The emergency stop indicator is FLASHING.Repair: The GSC may have failed. It is unlikely that the GSC has failed. Exit this procedure and perform this entire procedure again. If the problem remains, replace the GSC. See Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace". Stop.